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PDF LT1051 Data sheet ( Hoja de datos )
| Número de pieza | LT1051 | |
| Descripción | Dual/Quad Precision Zero-Drift Operational Amplifiers With Internal Capacitors | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LT1051 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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LTC1051/LTC1053
Dual/Quad Precision
Zero-Drift Operational Amplifiers
With Internal Capacitors
FEATURES
DESCRIPTIO
■ Dual/Quad Low Cost Precision Op Amp
■ No External Components Required
■ Maximum Offset Voltage: 5µV
■ Maximum Offset Voltage Drift: 0.05µV/°C
■ Low Noise 1.5µVP-P (0.1Hz to 10Hz)
■ Minimum Voltage Gain: 120dB
■ Minimum PSRR: 120dB
■ Minimum CMRR: 114dB
■ Low Supply Current: 1mA/Op Amp
■ Single Supply Operation: 4.75V to 16V
■ Input Common Mode Range Includes Ground
■ Output Swings to Ground
■ Typical Overload Recovery Time: 3ms
■ Pin Compatible with Industry Standard Dual and
Quad Op Amps U
APPLICATIO S
■ Thermocouple Amplifiers
■ Electronic Scales
■ Medical Instrumentation
■ Strain Gauge Amplifiers
■ High Resolution Data Acquisition
■ DC Accurate R C Active Filters
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LTC®1051/LTC1053 are high performance, low cost
dual/quad zero-drift operational amplifiers. The unique
achievement of the LTC1051/LTC1053 is that they integrate
on chip the sample-and-hold capacitors usually required
externally by other chopper amplifiers. Further, the
LTC1051/LTC1053 offer better combined overall DC and
AC performance than is available from other chopper
stabilized amplifiers with or without internal sample/hold
capacitors.
The LTC1051/LTC1053 have an offset voltage of 0.5µV,
drift of 0.01µV/°C, DC to 10Hz, input noise voltage typically
1.5µVP-P and typical voltage gain of 140dB. The slew rate
of 4V/µs and gain bandwidth product of 2.5MHz are
achieved with only 1mA of supply current per op amp.
Overload recover times from positive and negative
saturation conditions are 1.5ms and 3ms respectively,
about a 100 or more times improvement over chopper
amplifiers using external capacitors.
The LTC1051 is available in an 8-lead standard plastic
dual-in-line package as well as a 16-pin SW package. The
LTC1053 is available in a standard 14-pin plastic package
and an 18-pin SO. The LTC1051/LTC1053 are plug in
replacements for most standard dual/quad op amps with
improved performance.
TYPICAL APPLICATIO
High Performance Low Cost Instrumentation Amplifier
R1 R2
5V
R2 2 – 8
1/2
LTC1051
1
R1
6
–
VIN 3 +
R1 = 499Ω, 0.1%
1/2
VIN
5
LTC1051
+4
R2 = 100k, 0.1%
GAIN = 201
– 5V
MEASURED CMRR ~ 120dB AT DC
MEASURED INPUT VOS 3µV
MEASURED INPUT NOISE 2µVP-P (DC – 10Hz)
7
1051/53 TA01a
LTC1051 Noise Spectrum
120
100
80
60
40
20
10
100 1k
FREQUENCY (Hz)
10k
1051/53 TA01b
10513fa
1
1 page  
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1051/LTC1053
Overload Recovery
Small Signal Transient Response
Large Signal Transient Response
400mV
INPUT
0
OUTPUT
0
– 5V
AV = –100
VS = ±5V
OUTPUT
50mV
/DIV
OUTPUT
2V/DIV
0.5ms
INPUT
100mV
1051/53 G10
2µs/DIV
AV = 1, RL = 10k, CL = 100pF
VS = ±5V, TA = 25°C
INPUT
6V
1051/53 G11
2µs/DIV
AV = 1, RL = 10k, CL = 100pF
VS = ±5V, TA = 25°C
1051/53 G12
LTC1051/LTC1053 DC to 10Hz Noise
VS = ±5V
TA = 25°C
1.4µVP-P
1µV
1 SEC
10 SEC
TEST CIRCUITS
Electrical Characteristics Test Circuit
1M
V+
1k 2 – 8
1/2
LTC1051
3+ 4
6
OUTPUT
RL
V–
DC 10Hz Noise Test Circuit
100k
475k
0.01µF
10Ω 2 –
1/2
6 158k
316k
475k
LTC1051
3+
0.1µF
0.01µF
–
LT1012
+
FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
TO X-Y
RECORDER
1051/53 TC01
10513fa
5
5 Page 
TYPICAL APPLICATIO S
Obtaining Ultralow VOS Drift and Low Noise
B
+
5
+
2
–
1/2
3 LTC1051
1/2
1
R4
6 LTC1051
–
7
+ 5V
R5 C1
R1 R2
1 R3
3+ 86
A1 OUT
– 2–
A
C2
LTC1051/LTC1053
The dual chopper op amp buffers the inputs of A1 and
corrects its offset voltage and offset voltage drift. With the
R, C values shown, the power-up warm up time is typically
20 seconds. The step response of the composite amplifier
does not present settling tails. The LT1007 should be used
when extremely low noise; VOS and VOS drift are sought
when the input source resistance is low—for instance a
350Ω strain gauge bridge. The LT1012 or equivalent
should be used when low bias current (100pA) is also
OUT required in conjunction with DC to 10Hz low noise and low
VOS and VOS drift. The measured typical input offset
voltages were less than 2µV.
1051/53 AC01a
A1
LT1007
LT1012*
R1 R2 R3 R4 R5
3k 2k 340k 10k 100k
750Ω 57Ω 250k 10k 100k
C1
0.01µF
0.01µF
C2
0.001µF
0.001µF
eOUT(DC – 1Hz)**
0.1µVP-P
0.3µVP-P
eOUT(DC – 10Hz)**
0.15µVP-P
0.4µVP-P
* Interchange connections A and B .
** Noise measured in a 10 sec window. Peak-to-peak noise was also measured for 10 continuous minutes: With the LT1007 op amp the recorded noise was less than 0.2µVP-P for both DC-1Hz
and DC-10Hz.
VS = ±5V
LTC1051/LT1007 Peak-to-Peak Noise
DC TO 1Hz
NOISE
1 SEC/DIV
DC TO 10Hz
NOISE
1051/53 AC01b
10513fa
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LT1051.PDF ] | |
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